Clinical characteristics
Univariate regression analyses showed that more baseline health
anxiety (HAI), general anxiety (BAI), and anxiety sensitivity (ASI)
predicted more improvement in health anxiety. Depressive symptoms,
years with severe health anxiety, concurrent stable psychotropic
medication with SSRI/SNRI, comorbid depression, comorbid
anxiety disorder did not significantly predict improvement. In the
final multiple and quantile regression models, baseline health
anxiety and anxiety sensitivity remained significant predictors.
Demographic variables
No demographic variables, i.e. age, gender, having children,
computer skills, educational level, or marital status significantly
predicted improvement in health anxiety.
Therapy process related factors
More completed modules, higher levels of treatment credibility,
somatosensory amplification, and mindful non-reactivity, and
better working alliance were significant predictors in the univariate
regression analyses. Reading ability and time spent reading were
not significantly related to outcome and there were no moderators.
In the final multiple regression and quantile models number of
completed modules, treatment credibility and working alliance
remained significant predictors.
Decision tree based on signal detection analysis
Fig. 1 displays the results of the signal detection analysis based
on recursive partitioning. As shown in Fig. 1 treatment credibility
and baseline health anxiety were significant predictors of clinically
significant improvement